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Upload the ZIP the Android Health Connect app writes and import its `health_connect_export.db` in the background, the same way an Apple Health export is imported: streamed to disk with a SHA-256, capped at 1 GiB, one import per account, a job row of kind `health_connect` that the shared reconcile cron and staging sweep now look up on its own queue. The worker extracts the database (4 GiB ceiling, zip-bomb checks) and opens it read-only with `immutable=1`, `trusted_schema=OFF` and `query_only`. A view in place of a record table refuses the file, columns are found by name, and schema versions below 9 are refused. Records are read in batches of 500 and aggregated in SQLite: steps, energy and distance as one total per day from the app the person's Health Connect priority list ranks first, heart rate per minute for 90 days and as hourly means before that, sleep stages with the unknown stage counted only in sessions without real stages, workouts, cycle days, water and micronutrients. Apps whose integration the account has connected are left out, and a reading already stored under another source is skipped. Rows carry source HEALTH_CONNECT, `hc:<uuid>` or the `stats:` ids, so a second import of the same export writes nothing. Both staged files are removed on every way out; the job result holds counts per type and per app only. Settings gain a Health Connect card with the export steps, progress and the outcome, in all seven languages, and the import is documented in docs/integrations/health-connect.md.
prisma/
The database layer. HealthLog runs PostgreSQL 16 via Prisma 7. This directory holds the single schema file and the forward-only migration history; the generated client is emitted elsewhere.
Contents
schema.prisma— 61 models, one file.cuid()primary keys,snake_casecolumns via@map(...), encrypted columns mostly suffixed*Encrypted(search the file; there are 24 encrypted column references). Thegenerator clientblock emits to../src/generated/prisma(imported as@/generated/prisma).migrations/— numbered, forward-only SQL migrations (0001_…upward).migration_lock.tomlpins the provider topostgresql.
Migration workflow
# author a migration from a schema edit
pnpm dlx prisma migrate dev --name <short_snake_case_name>
# regenerate the client after any schema change
pnpm dlx prisma generate
Number a new migration with the next free prefix. The production entrypoint runs prisma migrate deploy on boot, so every migration must apply cleanly forward — there is no down-migration path. Always include the migration file in the same change as the schema edit.
Conventions
- Encryption is fail-closed:
*Encryptedcolumns are written through@/lib/crypto(AES-256-GCM, versioned key ids); never store plaintext in an encrypted column. Key rotation isscripts/rotate-encryption-key.ts+docs/ops/encryption-key-rotation.md. - The generated client under
src/generated/prismais build output — do not edit it. - Schema-touching changes that affect the API surface must regenerate
docs/api/openapi.yaml(see../CLAUDE.md).
Related: ../src/lib/README.md (db.ts, rollups/), ../docs/ops/ (migrations + backup runbooks).